The idea that tiny amounts of antidepressants present in our rivers and estuaries may be affecting aquatic life is generally met with surprise, sometimes scepticism, or even a degree of humour. The public…

Millions of people use diclofenac, an over-the-counter painkiller, to relieve pain and inflammation caused by arthritis, backache and other conditions. But on Friday, the UK medicines regulator, the Medicines…